PREDICTION OF VIBRATIONAL POWER TRANSMISSION THROUGH JOINTED BEAMS

When attempting to control the vibration transmitted from a machine into and through the structure upon which it is mounted, it is desirable to be able to identify and quantify the vibration transmission paths in the structure. Knowledge of transmission path characteristics enables procedures to be carried out, for example, to reduce vibration levels at points remote from the source, perhaps with the objective of reducing unwanted radiation of sound. One method for obtaining transmission path information is to use the concept of vibrational power transmission. This paper is concerned with the prediction of vibrational power transmission through a system of jointed beams carrying longitudinal and flexural waves. Models have been developed which determine the wave type which carries most power in each section of the system. By establishing the wave type which predominantly causes power transmission it is then possible to apply the most suitable vibration control technique. © 1990.